為瞭解臺灣身心障礙之家庭照顧者的支持性服務使用率偏低原因，本文假定支持性服務使用歷程是由「需要認定、使用決定」等二階段構成，採用2021年臺北市身心障礙者生活狀況調查資料，以序列邏輯模型、邏輯迴歸、零波松迴歸分析影響服務的需要與使用決定因素。結果顯示影響服務需求與使用的主要變項為：身障者支持性服務使用經驗（機會因素）、照顧者負荷（能力因素）、身障者自我照顧能力（意願因素）等。政策若鼓勵家庭照顧者以使用服務為目的，則從擴大其認識自己需要、瞭解—試用—參與各項福利服務，以助其釋放照顧壓力與維持照顧量能。

To understand the reasons behind family caregivers’ low use of supportive services, this study hypothesizes that the customer journey of this use consists of two stages: “need determination” and “use decision.” Using data from the 2021 Taipei City Disability Survey, the study employs a sequential logit model to analyze the factors influencing the “need” and “use” of various supportive services. Additionally, it adopts a zero-truncated Poisson regression to examine the “number of needs” and “number of uses” of these services. Although the influencing factors for the four research questions differ, three variables consistently emerge as the most influential: “experience with using supportive services of the person with disabilities,” “caregiver burden,” and “self-care ability of the person with disabilities.” If the policy goal is to encourage family caregivers to use supportive services, future service delivery designs should focus on enhancing family caregivers’ awareness of their own needs and relevant welfare services.